I did my front and rear differentials at home with 4 quarts of synthetic gear lube from Wal Mart for $10.00 per quart. I don't know the brand but it seems to be working. You will need 2 different tools to remove the drain plugs, the rear takes a square drive ratchet but the front has a drain and fill plug that take a big metric allen wrench, for which I had to buy a whole set at Sears for $40.00 just to get the one tool I needed. The fill hole is in a tight place on the front of the front differential and I had to remove the allen part of the tool from the 1/2" socket and turn it with a wrench to use it. It was a pain but I got it done for $80.00, versus almost $300.00 at the dealer!

I just changed mine. You have to use the Mopar transfer case fluid. For the front/rear diffs, I used that Royal Purple stuff. I can honestly say changing all those fluids really quieted my Jeep down. I used to have this loud muffled noise when I punched it, coming from underneath the Jeep. Now I dont hear a thing, only the engine and exhaust. Hope this helps.

I just changed mine. You have to use the Mopar transfer case fluid. For the front/rear diffs, I used that Royal Purple stuff. I can honestly say changing all those fluids really quieted my Jeep down. I used to have this loud muffled noise when I punched it, coming from underneath the Jeep. Now I dont hear a thing, only the engine and exhaust. Hope this helps.

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